Re: [Xen-API] Java XML RPC with Xen-API?

[Ewan Mellor <ewan@xxxxxxxxxxxxx>]

On Mon, Apr 02, 2007 at 11:21:58PM -0400, Stefan Berger wrote:

> Ewan Mellor <ewan@xxxxxxxxxxxxx> wrote on 04/02/2007 05:40:26 PM:
> 
> > On Mon, Apr 02, 2007 at 03:37:17PM -0400, Stefan Berger wrote:
> >
> > > Evan Bigall <evan.bigall@xxxxxxxxxxx> wrote on 04/02/2007 01:50:40 PM:
> > >
> > > > My "execute" method returns result.get("Value"), you should then be
> able
> > > > to cast that into a java Set, and iterate through all the key/value
> > > pairs.
> > >
> > > I would hope so, too, but it results in a ClassCastException. Which
> XML
> > > RPC library are you using and what version?
> >
> > Glancing through the Apache XML-RPC library, version 3, it looks
> > like you should
> > either be able to cast that to either an Object [], or failing that, a
> > List.  Xen-API's Sets are marshalled as XML-RPC <array>s on the wire,
> and
> > it's up to the client library how to interpret that.
> >
> > If you call getClass() on the result, you can see what it's giving you
> > back.
> >
> 
> Here is what is coming back:
> 
> This first one is for estblishing the session -- works
> 
> -->{Status=Success, Value=7f0a5d0b-c0ff-f948-36e5-cbad03caf24c}
> UUID: 7f0a5d0b-c0ff-f948-36e5-cbad03caf24c
> 
> The VM.get_all returns a 'Set' -- only an Object comes back
> 
> Calling VM.get_all(7f0a5d0b-c0ff-f948-36e5-cbad03caf24c,...)
> Returned object = {Status=Success, Value=[Ljava.lang.Object;@1faba46}
> 'Value' has type class [Ljava.lang.Object;

[Ljava.lang.Object means an Object[].  This is what I would expect.  Each
element in that will be a String, so you will have to cast Value to Object [],
and then cast each element in that array to String (because object references
are strings on the wire).

Ewan.

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